if you guys can go to the shop in the mall i recommend you do that. the reps are really helpfull. wanted to purchase the 2+1 but didnt know my number. rep looked me up and made the switch while i was there and printed out the instructions for me as well. i reckon thats the way to go with this. although i made the non roaming switch using that email...

OK first I went to Bellville Telkom shop Lady there told me "sorry can't you have to take the R149 promo".....called 180 and once again was told not possible and the Lady offered me the R149 promo only got to the Zevenwaght Telkom Shop in the afternoon had a battle to explain the Lady on duty however got hold of the Guy that assisted yesterday and I was sorted out.
Speed tests below (international not so good)

if I take my simcard to the 8ta store, will they be able to make it non roaming?

not sure, i just rica'd there. emailed. although if u gonna do that 2+1 then they can do that change there. had a good experience at somerset mall as well. guy knows his stuff. guy at canal walk also good. telkom direct store with 8ta reps.

I spoke to a guy in Canal Walk @ the 8ta store and he said it can't be done.

My girlfriends sim started using the 8ta network randomly about 3 weeks ago, and on Saturday mine suddenly started using the 8ta network as well (full signal, no "SOS"), went to gym this morning and it lost signal so it popped over to MTN roaming, then when I got home it went back to 8ta.

I emailed social@8ta.com a few times about swapping me over but nothing came back.. I would say perhaps they listened but I didn't ask for my girlfriends number to be swapped over.. just the luck of the draw i guess?

My girlfriends sim started using the 8ta network randomly about 3 weeks ago, and on Saturday mine suddenly started using the 8ta network as well (full signal, no "SOS"), went to gym this morning and it lost signal so it popped over to MTN roaming, then when I got home it went back to 8ta.

Your gfr must be on the contract. Only contract SIM can roam to MTN and use 8ta network simultaneously.
This thread is about making prepaid SIM non-roaming, as by default it roams to MTN and also is excluded from accessing 8ta network. It needs to be made to be able to purchase GoBig promo.